Before the civil war, most people in the north worked on plantations. on small farms. in churches. in factories.

in factories

Explanation:

Before the start of the Civil War The capitalist development of American society occurs rapidly due to the favorable historical and geographical conditions at the time of its formation. The revolutionary character of that process, heir to the most advanced political and economic ideals of the bourgeoisie of its time. This process added to the industrial revolution led to a great industrial development to the north, which allowed most of the people to work as wage earners in large factories.